1,721,355 research outputs found
Advanced control of a real smart polygeneration microgrid
No full textThis paper presents the development of a control approach for a smart polygeneration microgrid using the Model Predictive Control (MPC) paradigm. The importance of distributed generation systems has increased through recent years and questions of grid stability have emerged in the face of high concentrations of non-dispatchable power sources. Numerous proposals for "smart" distribution systems have emerged, including an architecture called the Energy Hub (E-Hub), which is a smart microgrid where both thermal and electrical power are supplied to customers by a mix of generator systems. The problem deals with a constrained Multi-Input Multi-Output (MIMO) optimization problem. This paper describes work underway on a real E-Hub located at the laboratories of the Thermochemical Power Group (TPG) of the University of Genoa (UNIGE), Italy. The TPG E-Hub is being integrated into a larger smart polygeneration grid under construction on the Savona campus of UNIGE as part of the European Union Resilient project. The proposed control approach aims to optimize the loading of various resources of the E-Hub in response to changing electrical and thermal demands from the campus-wide smart grid. This paper presents some of the results from initial testing of this approach to E-Hub control
Criminologia critica. Delinquenza e controllo sociale nel modo di produzione capitalistico
No full textMicromorphology of two archeological site in the Liguria Region and their paleoclimatic implication.
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The digital in the nursery and kindergarten:create immersive through collaboration
No full textThis paper presents a research experience (case study) on the use of digital technologies for the development of the
ability to invent stories for images in a collaborative way, in some nurseries (0–3 years) and in some kindergartens in
La Spezia. We have involved in the experience: the sections of the older children of the nursery (3 years); the
heterogeneous sections of kindergarten, with the aim of presenting different educational activities and technologies
(PC, tablet, projector ...) - prepared by educators–teachers and researchers - in an immersive environment to enable
children to enter into the image and interact with it. The collaborative activities have also predicted the use of i-
Theatre, an interactive integrated system for the narrative creation of multimedia stories. During the activities,
educators and researchers conducted free observations that aim to bring out possible elements of transferability of the
experience and set the second stage of work (model of research-training)
Thermoeconomic analysis of csp air-Steam mixed cycles
No full textThis paper investigates the integration of Concentrating Solar Power technology in air-steam Mixed Cycles for power production. Starting from a state of the art of CSP plants and the undergoing research in hybridization of Gas Turbine plants, the paper investigates alternative plant configurations particularly regarding the integration of CSP technology with mixed cycles, assessed and compared with a through-life thermo-economic analysis. Solar heat collected by on the market CSP mirrors at moderate temperatures (300°C-500°C) can be employed to increase conventional steam-injection gas turbine power plants performances. Solar concentrating collectors for current steam solar power plants can be used for such an application can be simpler and less expensive than collectors supposed to be used for hybrid GT CSP Plants which need high temperature systems (collectors and receivers). The solar hybridization of mixed cycles could be a good opportunity to combine gas turbine technology and CSP systems thus augmenting efficiency and achieving power dispatchability, but avoiding dedicated combustion chambers for hybrid CSP purposes (one of the big technologic problems to combine CSP and Gas Turbine technology). Moreover, the availability of commercial steam injected gas turbines at intermediate power range (10-100MW) allows the realization of such hybrid mixed CSP power plants in their typical size, avoiding the need for very large solar fields and reducing the technological risk as well as the time to market. Focus is on the design of the plant that was made analyzing different factor like solar share factor1, water consumption and reintegration and LCOE. A comparison of this innovative hybrid CSP-STIG plant with traditional STIG, Integrated Solar Combined Cycles (ISCC) and a traditional Combined Cycle was made. The mixed cycles CSP plants are analyzed using the original software WTEMP for the design point analysis, whose library was updated with dedicated modules. The analysis shows that combining CSP technology with existing mixed cycles lets cost-competitive plant configurations with a relatively short time to market
From LNG to LH2 in Maritime Transport: A Review of Technology, Materials, and Safety Challenges
No full textThe adoption of low-carbon fuels in maritime propulsion requires operational autonomy, material suitability, and compliance with safety standards, making liquid fuels like LNG and LH2 the most viable options. LNG is widely used for reducing GHG, NOx, and SOx emissions, while LH2, though new to the maritime sector, leverages aerospace experience. This paper explores the operational requirements and challenges of LH2 cryogenic handling systems using LNG practices as a reference. Key comparisons are made between LNG and LH2 supply systems, focusing on cryogenic materials, hydrogen embrittlement, and structural integrity under maritime conditions. Most maritime-approved materials are suitable for cryogenic use, and hydrogen embrittlement is less critical at cryogenic temperatures due to reduced atomic mobility. Risk assessments suggest LH2's safety record stems from limited operational data rather than superior inherent safety. The paper also addresses crucial safety and regulatory considerations for both fuels, underscoring the need for strict adherence to standards to ensure the safe and compliant integration of LH2 in the maritime industry
Tecnologie e sostenibilità nella didattica universitaria. Un’esperienza laboratoriale
Full text linkThe paper presents a university teaching laboratory carried out using technology. The focus of the lab was the topic of sustainability. In order to build new knowledge and share competences, face-to-face collaborative activities were blended with online ones. This methodological approach was consistent with the theme of sustainability, as it contributed to develop interdisciplinary, social and cultural knowledge
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